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Glass vs stone fermentation weights matters because the weight’s only job is to keep vegetables under the brine, where oxygen cannot reach them. Glass weights are smooth, non-porous and easy to clean. Stone and ceramic weights, usually sold with crocks, are heavier and sized for bigger vessels but can be porous if unglazed.
We compare both and pick six weights, crocks and kits.
Quick Answer: The Glass vs Stone Fermentation Weights
- Best Glass WeightsElementi Fermentation Weight Set of 4, Glass
- Best Glass KitElementi Fermentation Kit, 4 Glass Weights and Airlock Lids
- Best Stone WeightsTSM Products Harsch Fermentation Pot, 15 Liter
- Best Crock WeightsTOMO Fermentation Crock with Weights, Ceramic Sauerkraut Crock
- Best Ceramic WeightsKILNER Fermentation Set with Ceramic Weights and Airlock Lid
- Best JarsBall Wide Mouth Mason Jars, 32 oz., 4 Pack
For mason jars, glass weights like Elementi’s are the easy choice. For crocks, use the stone or ceramic weights made for that crock, such as those with the Harsch and TOMO crocks. Kilner’s set includes ceramic weights, and Ball jars pair with any wide-mouth weight.
Glass vs Stone Fermentation Weights Comparison Table
| Product | Best For | Type | Key Feature | Buy |
|---|---|---|---|---|
| Elementi Glass Weights, 4 | Best Glass Weights | Glass fermentation weights | Heavy glass discs for wide-mouth jars | Check Price |
| Elementi Fermentation Kit | Best Glass Kit | Mason jar fermentation kit | Weights plus lids in one kit | Check Price |
| Harsch 15 L Fermentation Pot | Best Stone Weights | Water-seal fermentation crock | German-style crock with a water moat and stone weights | Check Price |
| TOMO Fermentation Crock | Best Crock Weights | Water-seal ceramic crock | Mid-size crock with water seal and weights | Check Price |
| Kilner Fermentation Set | Best Ceramic Weights | Glass fermentation jar set | Glass jar with airlock lid and ceramic weights | Check Price |
| Ball Wide Mouth 32 oz., 4 | Best Jars | Glass mason jars | Quart jars that fit most fermentation lids | Check Price |
6 Picks: Glass Weights, Stone Weights and Kits
Glass first, then stone and ceramic.
1. Elementi Fermentation Weight Set of 4, Glass
1. Elementi.
👍 Pros & Cons
Pros
- Non-porous and easy to clean
- See food under the weight
- Grip notch for lifting
Cons
- Can chip if dropped
- Wide mouth only
📄 Detailed Review
- Count: 4 (listing)
- Material: Glass (listing)
- Fits: Wide mouth jars (listing)
The standard glass weight.
Best glass weights.
2. Elementi Fermentation Kit, 4 Glass Weights and Airlock Lids
2. Weights + lids.
👍 Pros & Cons
Pros
- Complete starter kit
- Weights and lids match
- Good for beginners
Cons
- Jars sold separately
- Small batches
📄 Detailed Review
- Includes: 4 glass weights + lids (listing)
- Fits: Wide mouth jars
- Material: Glass, silicone
A complete jar kit.
Best kit.
3. TSM Products Harsch Fermentation Pot, 15 Liter
3. Harsch stones.
👍 Pros & Cons
Pros
- Water seal keeps air out without burping
- Large batches of sauerkraut
- Heavy, stable stoneware
Cons
- Very heavy when full
- Pricey and large to store
📄 Detailed Review
- Capacity: 15 L (listing)
- Seal: Water channel (maker)
- Includes: Weighting stones (listing)
The classic German water-seal crock.
Reviewed model.
4. TOMO Fermentation Crock with Weights, Ceramic Sauerkraut Crock
4. TOMO.
👍 Pros & Cons
Pros
- Water seal design
- Size suits most kitchens
- Weights included
Cons
- Heavier than glass
- Check glaze notes
📄 Detailed Review
- Material: Ceramic (listing)
- Seal: Water channel (listing)
- Includes: Weights (listing)
A mid-size water-seal crock.
Best mid-size crock.
5. KILNER Fermentation Set with Ceramic Weights and Airlock Lid
5. Kilner.
👍 Pros & Cons
Pros
- See the ferment through the glass
- Airlock vents gas
- Small, easy batches
Cons
- Smaller than a crock
- Glass breaks if dropped
📄 Detailed Review
- Jar: Glass (maker)
- Lid: Airlock (maker)
- Includes: Ceramic weights (maker)
A clear, small-batch fermenting set.
Reviewed model.
6. Ball Wide Mouth Mason Jars, 32 oz., 4 Pack
6. Ball.
👍 Pros & Cons
Pros
- Cheap and easy to find
- Fits most weights and lids
- Clear glass
Cons
- Lids not made for fermenting
- Glass can crack with shock
📄 Detailed Review
- Size: 32 oz. (listing)
- Mouth: Wide (listing)
- Count: 4 (listing)
The jar most kits are built for.
Best jars.
How We Chose the Glass vs Stone Fermentation Weights
For this glass vs stone fermentation weights, we compared fermentation crocks, jars, lids and weights listed on Amazon US by capacity, seal type, material, weights and ease of cleaning, using product details from the listings and makers rather than a hands-on lab test. We then looked at common praise and complaints in buyer feedback for leaks, mold, odors, cracked glaze and how easy each one is to use. Ratings and prices change often, so check the current listing before you buy.
Use food-safe, lead-free crocks, keep food under brine, discard anything with fuzzy or colored mold following USDA Food Safety and Inspection Service cleanliness guidance. Our method is explained on the How We Test page.
Glass vs Stone Weights: Key Differences
Porosity
Glass is non-porous; unglazed stone can absorb brine and odors.
Weight
Stone and ceramic weights are heavier for big crocks.
Fit
Glass discs fit wide-mouth jars; crock stones are cut for one crock.
Breakage
Glass can chip or break if dropped; stone is tougher but can crack.
Cleaning
Glass goes in the dishwasher; stone weights are best hand washed and dried fully.
Tips for Safer Home Fermenting
- Keep vegetables under the brine at all times.
- Use 2 to 3 percent salt by weight for most vegetable ferments.
- Ferment at cool room temperature, about 60 to 75°F.
- Skim surface film and watch for fuzzy mold.
- When in doubt, throw it out.
Quick answers to common questions about glass vs stone fermentation weights.
Frequently Asked Questions
Are glass or stone fermentation weights better?
Glass is best for jars and easy cleaning; stone or ceramic suits crocks.
Can I use a rock from outside as a weight?
No, use food-safe weights made for fermenting.
Do weights prevent mold?
They help by keeping food under the brine, which is the main mold defense.
Glass vs stone fermentation weights: which lasts longer?
Both last for years with care; glass can chip if dropped.
Final Verdict
Our glass vs stone fermentation weights pick for jars is Elementi glass weights; for crocks, use the weights made for your crock, such as Harsch stones.
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Prices and availability change often. Check the current listing on Amazon before you buy.
